Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '074580bff939838b8c944844c3d6565584e09fae9d083e69781838d84ecc92e3' 
  AND token = '9GWujbx3XXczJWgcLZK8HU4L5VpETuFIeixhR0mUWg4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}